Provider Profile
John McCarthy, CRNP
Unclaimed ProfileAbout John Mccarthy
Listed in the NPI registry as a nurse practitioner — family, John McCarthy, CRNP practices in Gaithersburg, MD. According to Medicare claims data, John cared for 482 Medicare patients across 528 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (301) 509-4150
- Email not available
Practice Locations
21034 WOODFIELD RD
Gaithersburg, MD 20882
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Family generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Common cold
- Diabetes
- Flu
- High blood pressure
- Sinus infection
- UTI
Allergies
- Seasonal allergies
Allergy & skin
- Hives
Blood disorders
- Iron-deficiency anemia
Bone & joint
- Osteoporosis
Dermatology
- Head lice
- Precancerous sun spot
- Psoriasis
- Ringworm
- Rosacea
Digestive
- Celiac disease
- Constipation
- Hemorrhoids
Digestive health
- Acid reflux
- IBS
- Viral gastroenteritis
Eye conditions
- Pink eye
Heart health
- High cholesterol
Hormones & endocrine
- Hypothyroidism
Infections
- COVID-19
- Ear infection
- Herpes simplex of the skin
- Mononucleosis
- Shingles
- Strep throat
Men's health
- Testosterone deficiency
Mental health
- ADHD
- Anxiety
- Depression
Metabolic & weight
- Obesity
Nerve & joint
- Carpal tunnel
Nerve & spine
- Sciatica
Neurological
- Vertigo
Pain
- Gout
- Heel pain
- Lower back pain
- Migraines
- Osteoarthritis
Pain & spine
- Neck pain
Pediatric infections
- Hand, foot, and mouth disease
Respiratory
- Acute bronchitis
- Asthma
- Chronic cough
- Community-acquired pneumonia
Skin
- Acne
- Contact dermatitis
- Eczema
- Foot fungus
- Hair loss
- Poison Ivy
Sleep
- Insomnia
Urinary health
- Overactive bladder
Women's health
- Bacterial vaginosis
- Heavy periods
- Perimenopause
- Yeast infection
Procedures & services
Most searched procedures
- Annual physical exam
- Routine blood work
- Sick visit
- Sports physical
- Suture removal
- Vaccination
Allergies
- Allergy testing
Chronic condition care
- Chronic disease management visit
- Diabetic Foot Care
Dermatology
- Cryotherapy for skin spots
Diagnostic screening
- Bone density scan ordering
- Colon cancer screening ordering
- Mammogram ordering
Diagnostic tests
- Rapid flu test
Ear, nose & throat
- Earwax removal
Heart health
- EKG
Hormones & endocrine
- Hormone Replacement Therapy Consultation
Injections
- Vitamin B12 Injections
Injury care
- Sprain and Strain Care
Lab tests
- Cholesterol screening
- COVID-19 testing
- Hemoglobin A1c Test
- Rapid strep testing
- Thyroid Blood Test
- Urine Drug Screen
Lifestyle counseling
- Smoking cessation counseling
Mental health
- Mental Health Evaluation
Minor procedures
- Burn and Wound Care
- Incision and drainage of an abscess
- Ingrown toenail removal
- Superficial foreign-body removal
Minor surgery
- Minor laceration repair
Neurological care
- Concussion evaluation
Occupational health
- DOT Physical
Pain management
- Joint injection or aspiration
- Trigger Point Injections
Physical exams
- School Physical
Prescriptions
- Prescription Refill
Preventative care
- Medicare annual wellness visit
- Travel Vaccines for Kids
- Well-child visit
Preventative exams
- Camp Physical
- Pre-Op Clearance Exam
Respiratory care
- Breathing Treatment
Screenings
- TB test
Sexual health
- PrEP consultation
- STD Swabs and Screening
Skin procedures
- Mole Check
- Skin biopsy
- Skin Tag Removal
- Wart Removal
Sleep
- At-Home Sleep Study Ordering
Urgent care
- Splinting of minor injuries
- Tick Removal
Weight management
- Weight Loss Injections and Medication
Women's health
- Birth control counseling
- Contraceptive implant insertion and removal
- IUD insertion and removal
- Pap smear
- Pregnancy Confirmation Test
- Well-woman exam
Procedures Most Often Billed to Medicare
528 services · 482 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
17 | Less often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
117 | More often than most peers in Nurse Practitioner, Family |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
103 | More often than most peers in Nurse Practitioner, Family |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
88 | More often than most peers in Nurse Practitioner, Family |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
69 | More often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
59 | As often as other peers in Nurse Practitioner, Family |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
31 | As often as other peers in Nurse Practitioner, Family |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
17 | Less often than most peers in Nurse Practitioner, Family |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
15 | Less often than most peers in Nurse Practitioner, Family |
| Hemoglobin a1c level | Lab test | 83036 |
12 | Less often than most peers in Nurse Practitioner, Family |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners in Gaithersburg 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 7
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does John McCarthy specialize in?
John McCarthy is a nurse practitioner in Gaithersburg, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Family”.
NPI registry
Where is John McCarthy located?
John McCarthy is listed at 21034 Woodfield Rd, Gaithersburg, MD 20882. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John McCarthy's phone number?
The number on file is (301) 509-4150. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is John McCarthy's NPI number?
John McCarthy's National Provider Identifier is 1952814634. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John McCarthy train?
John McCarthy attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has John McCarthy been practicing?
John McCarthy has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What does John McCarthy do most often?
According to Medicare billing data, John McCarthy performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John McCarthy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John McCarthy. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.